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•Bacteria•Algae•Fungi•Protozoa•Viruses

Shape Rod shape/BacilliSpherical/CocciSpiral/Spirilla

Inside host

Use host machinery For multiplication

In number

It is outside the host

Inactive

No activity

Burst the host cell

Infact other cell

Person fall sick

Harmful And Useful

Of Microorganism

Usage Of Microorganism

• Making curd and Bread

• Medicinal use of

Microorganism

• Increasing Soil Fertility

• Cleaning the

Environment

• Vaccine

• commercial production

of alcohol and wine

Yeast is an example of microorganism. It is a fungus. It is used to make bread. There are air spaces in the bread. The air spaces are caused by carbon dioxide gas given out whenthe yeast acts on the dough. This shows that microorganisms breath.

Harmless Of Microorganism

Harmful microorganisms can cause disease

Some disease can easily spread from one person to another. They are called contagious diseases. Examples are influenza, measles, mumps and chicken pox.

How do microorganisms spread from one person to another?

• Through food and drink.

• Sneezing or coughing.

• Direct contact.

• Carried by mosquitoes or flies.

• Microorganisms can also spread through the air.

How to prevent disease from spreading?

• Wash your hands before handling food especially after using the toilet.

Drink water that has been boiled because boiling kills microorganisms.

• Cover your mouth when coughing or sneezing to prevent microorganisms from spreading into the air.

• Do not share personal items such as toothbrush, towel and comb.